[sane-devel] Status for Canon 5600F with GL847

[stef]

Le Sunday 09 January 2011 18:18:19 Stefan Larsson, vous avez écrit :
> Hello,
> 
> I am writing a short status report on my efforts on getting any life out of
> the 5600F. I also found documentation for GL846 and GL848 which helped a
> lot to understand things.
> 
> The initialization phase is looking quite good now up to start of scanning.
> No data is received since the motor is not moving (just a very short
> clicking sound is heard). The lamp is on. I believe I am writing correct
> values to the frontend and that the GPIO is initialized correctly
> (maybe)...
> 
> I would appreciate any hints on what could be the problem with getting the
> motor moving. I am attaching an annotated USB-log, one SANE-log, a code
> diff and the script I am using to run the test.
> 
> I have not started changing in acceleration curves, the question is whether
> this such details are of importance at all for starting the motor?
> 
> Thanks,
> /Stefan Larsson

	Hello,

	motor curves are essential for the motor to move. I think it is the most 
sensitive part of the gl847 code. The reg 6C setting is also important since 
it drive motor's Vref.
	Until you have reach 'first light' status, I think you'd better make the 
backend skip calibration and warmup by addig the following flags to the device 
description: GENESYS_FLAG_SKIP_WARMUP, GENESYS_FLAG_NO_CALIBRATION . That way 
the backend will only try to do a uncalibrated scan. Once this is working, 
you'll may look into calibration.

Regards,
	Stef